what is meaning of this plzz tell me

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Mohd Shahrukh
Mohd Shahrukh 2018-3-21
评论： Star Strider 2018-3-26
feat=[]; class=[];

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Star Strider
Star Strider 2018-3-21
Those assignments set the ‘feat’ and ‘class’ variables to empty arrays [].
Note that class (link) is a MATLAB function, and assigning a variable the same name ‘overshadows’ it. This will cause problems later if you want to use the class function.

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Walter Roberson
Walter Roberson 2018-3-21
When you assign [] to an entire variable, it assigns a double precision value that is 0 rows by 0 columns -- the empty double precision array.
When you assign [] to an indexed variable, such as feat(3,:) = [], then the meaning is quite different: it means to delete the indicated portion of the variable.

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